speed limit dependent on the curve radius

[cerulean locust]

Currently trains slow down the same no matter the curve radius or the incline of the track. What If the speed limit dependent on the radius or the curves?
Some mathematical formulas:
https://en.m.wikipedia.org/wiki/Minimum_railway_curve_radius

[graceful iron]

This would be amazing considering most of wrf line has the tiniest slight curve that caps speed on almost the whole line

[cerulean locust]

Now the question is how to calculate the curve radius

[near prawn]

we've thought about this behind the scenes and it is doable

[cerulean locust]

Oh then you could calculate the maximum speed with something like this

Most of it is constants though for the purpose of minecraft

like the friction coefficient and the superelevetion which doesn't exist in create as curved tracks dont have a height diffrence between rails

also what is the gravity acceleration in minecraft?

or should the calculation be made using earth parameters

Because if we use earth parameters the formual is reduced to this

[ripe spade]

I think it's already done to check whether curve is tight and cannot be placed

[weak wolf]

but it isn't saved

[rigid flare]

But the part of the code that does it already exists, so if there aren't any major problems, you can copy the existing code to calculate it

[cerulean locust]

Those calculations are for realistic pieces of track and will be a nuisance as the speeds are going to be really low

I propose adding a multiplier or using a diffrent scale

for meters per block

[ripe spade]

or if they added 22,5* tracks it'd be possible to do some "straigther curves"

[dusky glade]

It would have to be roughly 26.6°, but I agree it would be nice. Sounds complicated to implement though, would have to be double long

[vivid beacon]

Equation wouldn’t work

[cerulean locust]

yeah i did notice it later

They are compleatly out of scale

[vivid beacon]

Remove the elevation

And have the friction coefficient as .7

“The aim for rail operators is to reduce the coefficient of friction to a safe intermediate level that allows normal traction and braking, and which remains stable under all normal operating conditions. At the wheel/rail interface, this is usually within the 0.3-0.4 range. On a dry unlubricated rail, it is around 0.7.” https://www.rsclare.com/blog/top-of-rail-friction-management-explained/#:~:text=The aim for rail operators,rail%2C it is around 0.7.

[cerulean locust]

now that your saying it like that , yeah it does make sense

[vivid beacon]

I hope you know I wished months ago I could do this 😭

Now I can derive the equation and know how it works

[errant latch]

How does the train know when to slow down enough before a curve?

[vivid beacon]

Nodes

[cerulean locust]

Additional idea, Track type influeance the Max speed

So wooden tracks would have lower max speed

And "concreate" ones would have a higher one

Also woudl make the speed function diffrent for both of them?

So to distinguish high speed mainlaine from spurs

[vivid beacon]

I’ve thought about that but no one likes the idea

[cerulean locust]

Yeah but now its gonna be combined with this. Maybe make it configurable?

[weak wolf]

disabled by default

it just makes wooden tracks bad

doesn't really add much to gameplay

[vivid beacon]

True

I still think using the math which is highly possible to be a better idea

If we worry to much about speed or could be made so within a gradient it’s high speed and if the corner is too sharp then it’ll slow the train

[cerulean locust]

Yes make the function curve diffrent for diffrent types of track